Cylinder for treating heated metal.



UNITED lSTATES PATENT OFFICE.

JAMES W. MOSHIER, OF BRISTOL, CONNECTICUT, ASSIGN OR VTO THE CHASE ROLLING MILL CO., OF WATERBURY, CONNECTICUT, A CORPORATION.

Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed December 14, 1903. Serial No. 185,100.

To all whom, t may concern:

Be it known that I, JAMES W. MosHIER, a citizen of the United States, residing at Bristol, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Cylinders for Treating Heated Metal, of which the following is a specification.

My invention relates to improvements in cylinders for treating heated metal under pressure, and the objects of my improvements are simplicity of construction and efliciency of the cylinder when constructed.

In the accompanying drawings, Figure l is a central longitudinal section of my cylinder with a portion broken off from one side. Fig. 2 is a reduced sectional view of the same on the line x of Fig. 1.

A designates the main or outer cylinder, and B the inner cylinder, the inner surface of the latter being cylindrical to form the cylindrical chamber into which the heated metal is to be placed and from which the metal is forced under pressure through any suitable die by means of a piston in any ordinary manner. The exterior form of the main cylinder is immaterial to my invention, although I prefer to form it with rounded Sides, as shown at the left-hand side of Fig. l, the diameter at the middle on the line :1: a: being greater than the diameter at the respective ends. I also prefer to provide the cylinder with trunnions on opposite sides, one of the said trunnions 3 being shown in Fig. 2, while the opposite trunnion is broken off. One of the said trunnions is also indicated in the distance by the broken circle 3 in Fig. l. As herein shown, these trunnions are cast in one and the same vpiece with the main cylinder A.

The said main cylinder is of cast steel and has three annular heat-insulators 4, 5, and 6, that form a permanent part of the said main cylinder by being cast into the metal of which the said main cylinder is formed, the metal of the said main cylinder completely surrounding the said insulators both outside and inside and at both ends. The casting was properly cored or formed with a central bore extending through it substantially from end to end. These insulators were iirst formed of traprock, soapstone, granite, or other heat-insulating material by being molded under pressure to give them the form of stone tubes. After proper baking or drying they were supported in the proper position within the mold for casting by means of suitable and ordinary chaplets, preferably formed of metal, that will merge with the molten metal poured into the mold, and thus not be distinguishable in the finished casting.

The inner insulator 6 is made longer than the next outer one, and so on, thereby giving the several insulators a stepped form at the ends, as shown, whereby the cylinder may be insulated closely to its ends, and at the same time a suflicient amount of metal may cover the ends ofthe insulators to make the cylinder of sufficient strength. The metal between the several insulators is of about the same dimensions diametrically of the cylinder as the thickness of the insulators, while the inner wall 7 of the metal forming the bore of the main cylinder is much thinner, so as to bring the inner insulation closely to the inner cylinder and to the interior chamber of the said inner cylinder. The bore of the main cylinder may be turned out from end to end and the inner cylinder fitted thereto, preferably with a shoulder 8 at the end to hold the inner cylinder from being pushed longitudinally by the action of the piston that puts the metal in the cylinder under pressure. The inner cylinder is removable for the purpose of replacing it when damaged, and it is believed that the other parts are so durable as to require no provision for replacement.

I particularly wish to point out that the contraction of the metal in cooling places the heat-insulating tubes under a great pressure, whereby I secure the condensation of the heat-insulating material to a degree far beyond any condensation of it to be secured by the tamping process employed where the' concentric chambers are left open at one or both ends and lled after the casting of the the said seamless body, and each containing a heat-insulating tube entirely surrounded by and inclosed within the non-removable seamless body of the container.

IOO

2. Acylinderfor treating heated metal 3. A cast-metal cylinder for treating heati ed metal, having within its body a plurality of annular heat-insulators with the inner insulator longer than the' next outer one, giving the series of insulators a stepped form at both ends, the said ends being covered by af solid metal wall integral with the cast-metal body of the said cylinder, and fitting over the said stepped ends with squared faces at each end of the cylinder to gradually increase the thickness of the said end covering from the inner insulator outwardly and give the necessary strength for permanently holding the insulators in place and to prevent them from breaking.

JAMES' W. MOSHIE'R. Witnesses:

JAMES SHEPARD, H. S. Woons. 

